Oil well pump valve simulation test device

Abstract

The present invention provides a pump valve simulation test device, which includes a hydraulic pump station and a pump valve assembly. The hydraulic pump station outputs high-pressure liquid to the pump valve assembly in a forward and reverse bidirectional alternating manner, realizing the impact of up and down strokes on the valve ball in the pump valve assembly, simulating the operation of the pump valve ball, valve seat and valve cover in an oil well, thereby testing the impact resistance and wear resistance of the valve ball, valve seat and valve cover. The pump valve simulation test device can output high-pressure liquid in a forward and reverse bidirectional alternating manner through the hydraulic pump station, simulating the impact condition of the valve ball of a deep well downhole pump during up and down strokes, testing the impact resistance and wear resistance of the valve ball, valve seat and valve cover, thereby verifying the working performance of the pump valve and solving the problems that existing simulation devices cannot withstand high pressure and carry sand.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum equipment testing and detection, in particular to a pump valve simulation test device for an oil well pump. Background Art

[0002] In oil well production both domestically and internationally, the rod pumping system, consisting of a sucker pump, sucker rod, tubing, and pumping unit, is the predominant method of oil production. The oil well pump is a basic, reliable, and widely used piece of pumping equipment, playing a vital role in overall oil well production. The oil well pump primarily consists of a pump barrel, plunger, floating valve, and fixed valve. The floating valve is located within the plunger, while the fixed valve is located at the bottom of the pump barrel. Both the floating valve and the fixed valve consist of a valve ball, valve seat, and valve cover. The valve ball seals with the valve seat, acting as a one-way valve, while the valve cover limits the distance the valve ball can move from the valve seat. During operation, the sucker rod drives the plunger to reciprocate within the pump barrel, changing the volume of the pump chamber between the floating valve and the fixed valve. Both the floating valve and the fixed valve open only when the pressure below the valve ball exceeds the pressure above it, allowing liquid to flow through the valve seat. Otherwise, the valve ball seals against the valve seat, preventing backflow. During the upstroke, the sucker rod carries the plunger upward. The floating valve on the plunger closes due to the weight of the valve ball and the pressure in the pipe. The pump chamber volume increases and the pressure decreases. The fixed valve opens due to the pressure difference between the well submersion pressure and the pressure inside the pump, allowing crude oil to enter the pump. At the same time, the plunger pushes the liquid up the pump and discharges the liquid from the wellhead. During the downstroke, the sucker rod carries the plunger downward, the fixed valve closes, and the plunger squeezes the liquid in the pump, raising the pressure inside the pump to a level higher than the pressure above the plunger. The floating valve ball is pushed open, and the liquid in the pump is discharged into the oil pipe above the plunger. Throughout the operation of the oil pump, the pump valve is repeatedly subjected to the hydraulic impact of the fluid in the wellbore. The valve ball repeatedly collides with the valve cover and valve seat, causing damage to certain parts of the pump valve, reduced sealing performance between the valve ball and valve seat, or rupture of the valve cover. This seriously affects the performance of the oil pump. If the fluid is corrosive or contains solid media such as sand, it will accelerate the damage of the pump valve.

[0003] The floating valve and fixed valve are the core components of the oil well pump. These two types of valves work in harsh environments and are easily damaged, affecting the life of the oil well pump. By conducting impact and wear tests on the valves, the impact and wear resistance of valves with different materials, heat treatment processes, surface treatments, and structural designs can be tested. This provides guidance for optimizing the design and processing of valves, improving their service life, and verifying the working capacity of the oil well pump. However, there is currently no device that can simulate the impact of the valves during the upstroke and downstroke of the oil well pump by outputting high-pressure liquid in alternating forward and reverse directions through a hydraulic pump station. This device can realize the impact and wear resistance testing of the valves, and further study the influence of pressure differential, fluid, sand particles, etc. on the valve ball, valve seat, and valve cover.

[0004] Chinese patent application number CN01239850.0 describes a small-load fatigue testing machine. The eccentric loading mechanism has a top dead center (B) and a bottom dead center (BDC) (A). When the eccentric shaft rotates from BDC (BDC) A to BDC, the specimen loading point moves to the right. This half-cycle of loading simultaneously pushes the support piston to the right, forcing the oil in the support cylinder into the energy storage cylinder through a pipe. This raises the support piston and simultaneously raises the weight to its highest position to store energy. When the eccentric shaft returns from BDC (BDC) to BDC (BDC), the weight and energy storage piston descend, causing the support piston to push the specimen loading point to the left until the eccentric shaft reaches BDC A, completing one cycle. This cycle repeats until the specimen breaks, completing the fatigue test for a single specimen.

[0005] Chinese patent application number CN91227346.1 describes a grinding ball impact fatigue testing machine. Its structural features include a motor and a reduction gear mechanism installed at the bottom of an upright frame. Outward-inclined buckets are connected to the periphery of the gear mechanism at intervals. The upright frame features an inclined upper chute, connected to a vertical vertical pipe. The lower end of the vertical pipe is connected to a curved pipe, and the outlet of the curved pipe is connected to a small chute. Connected to the small chute is a lower chute. The bucket on the gear mechanism transfers the grinding balls to the upper chute, where they roll through the vertical pipe and curved pipe onto the small chute. From there, the balls roll onto the lower chute and fall into the rotating bucket, where they undergo repeated lifting and rotation testing. This application utilizes a motor and a reduction gear mechanism installed at the bottom of the upright frame. The bucket on the gear mechanism transfers the grinding balls to the chute, where they roll onto the small chute, and then repeat the test cycle. The test is slow and has minimal impact force. The current evaluation method for oil well pump valve blocks uses a vacuum test method, which requires a minimum vacuum of 64.32 kPa and a leak-free state for at least three seconds after remote isolation. During the test, the valve ball must rotate freely on the valve seat. However, this method cannot detect valve blocks with certain subsurface defects. Therefore, an impact fatigue test is used to improve detection effectiveness.

[0006] Chinese patent application number CN201010559969.4 describes a multifunctional rod pump lifting simulation test system. The system comprises an electro-hydraulic proportional lifting drive control system, an inclination simulation system, a mechanical connection system, a circulation process system, and a data acquisition and control system. The electro-hydraulic proportional lifting drive control system provides reciprocating linear motion power for dynamic performance testing of the oil well pump. The inclination simulation system allows the angle between the pump barrel and the plumb line to vary between 0° and 90°. The circulation process system simulates the actual downhole operating conditions of the oil well pump to conduct performance testing of the oil well pump. The mechanical connection system secures the oil well pump to a support frame, simulating the actual loading conditions of the oil well pump and ensuring the suction, discharge, dynamic sealing of the test medium, and the stability of the slender polished rod during the test. The data acquisition and control system collects, calculates, and processes data. This application can simulate the operating conditions of the oil well pump, meeting the requirements, but its structure is complex.

[0007] Daqing Petroleum Institute developed a "deep well pump-pumping unit test device" from 1990 to 1994. The device has three adjustable strokes of 0.5m, 0.9m and 1.2m. Parameters such as pressure and flow are measured manually, but the maximum pressure of the system does not exceed 0.3MPa.

[0008] The University of Petroleum and the Zhongyuan Petroleum Exploration Bureau jointly established an open-type oil production process test station. The oil well pump can operate at an inclination range of 50° to 90°, with a maximum stroke of 0.6m and a maximum outlet pressure of 1.0MPa. This device can simulate oil well pump performance tests at a certain inclination angle, but the overall pressure of the device cannot simulate the operation of deep-well pumps and valves.

[0009] In 2004, Daqing Petroleum Institute developed a "rod pump lift simulation ground test system" to promote and apply horizontal technology in the Daqing Oilfield. This system can test the performance of the pump and the changes in hydraulic characteristics at a certain inclination angle. However, it cannot be used for process tests such as sand inclusion.

[0010] The above existing technologies are all significantly different from the present invention and fail to solve the technical problem we want to solve. Therefore, we have invented a new oil well pump valve simulation test device. Summary of the Invention

[0011] The purpose of the present invention is to provide a pump and valve simulation test device for verifying the working performance of the pump and valve, and solving the problems that the existing simulation device cannot withstand high pressure, carry sand, etc.

[0012] The purpose of the present invention can be achieved through the following technical measures: a pump valve simulation test device, which includes a hydraulic pump station and a pump valve assembly. The hydraulic pump station outputs high-pressure liquid to the pump valve assembly in a positive and negative bidirectional alternating manner, thereby realizing the impact of the valve ball in the pump valve assembly by the up and down strokes, simulating the operation of the pump valve ball, valve seat and valve cover in the oil well, thereby testing the impact resistance and wear resistance of the valve ball, valve seat and valve cover.

[0013] The purpose of the present invention can also be achieved by the following technical measures:

[0014] The oil well pump valve simulation test device also includes a filter, which is connected to the inlet and outlet of the oil well pump valve assembly to filter sand particles in the oil well pump valve assembly to simulate the working condition of the oil well pump in a sand producing oil well.

[0015] The hydraulic pump station includes an oil tank, an oil suction filter, an electric motor, an air cooler, a bell coupling, a high-pressure filter, a cartridge-type one-way valve, an electromagnetic reversing valve and a gear pump. The electric motor is connected to the bell coupling, the bell coupling is connected to the gear pump, the oil suction filter is connected between the gear pump and the oil tank, the gear pump is connected to the cartridge-type one-way valve, the high-pressure filter is connected between the cartridge-type one-way valve and the electromagnetic reversing valve, the electromagnetic reversing valve is connected to the filter, and the air cooler is connected to the electromagnetic reversing valve. When the simulation When the fixed valve is in an upstroke, the motor works, driving the bell coupling, further driving the gear pump, and sucking the simulated medium from the oil tank. The simulated medium passes through the oil suction filter, is pressurized by the gear pump and enters the plug-in one-way valve, is filtered through the high-pressure filter, passes through the electromagnetic reversing valve, and then passes through the filter to enter the inlet of the oil pump valve assembly, enters the oil pump valve assembly, then passes through the outlet of the oil pump valve assembly, passes through the filter, passes through the electromagnetic reversing valve, and then passes through the air cooler into the oil tank.

[0016] The hydraulic pump station also includes a cartridge solenoid valve and a cartridge relief valve. The cartridge one-way valve is connected to the cartridge solenoid valve and the cartridge relief valve. The cartridge solenoid valve is connected to the electromagnetic reversing valve. When simulating the downstroke of the fixed valve, the motor rotates, driving the bell coupling, further driving the gear pump, and sucking the simulation medium from the oil tank. The simulation medium passes through the oil suction filter and is pressurized by the gear pump to enter the cartridge solenoid valve, and then passes through the electromagnetic reversing valve, passes through the outlet of the oil pump valve assembly, and enters the oil pump valve assembly. When the pressure exceeds the predetermined pressure of the cartridge relief valve, the simulation medium flows out through the overflow port of the cartridge relief valve, and then passes through the air cooler into the oil tank.

[0017] The hydraulic pump station also includes a superimposed speed regulating valve, which is located between the electromagnetic reversing valve and the filter and regulates and ensures the pressure at the inlet and outlet ends of the oil pump valve assembly.

[0018] The hydraulic pump station also includes a pressure measuring tool, which is located between the plug-in one-way valve and the high-pressure filter and measures the pressure at the inlet end of the superimposed speed regulating valve.

[0019] The hydraulic pump station also includes a pressure measuring joint, which is located between the superimposed speed regulating valve and the filter and measures the pressure at the inlet and outlet ends of the oil pump valve assembly.

[0020] The hydraulic pump station further comprises an air filter, which is located in the air cooler. Air enters the medium in the coil cooling pipeline through the air filter.

[0021] The hydraulic pump station also includes a liquid level and temperature gauge to measure whether the medium inside the oil tank is sufficient and whether the temperature exceeds the temperature limit of the oil tank and pipeline.

[0022] The oil pump valve assembly is a fixed valve assembly of the oil pump, including an outer shell, a valve cover, a valve ball and a valve seat. The upper and lower ends of the valve cover are connected to the outer shell. The valve ball and the valve seat are both located in the valve cover. The valve ball is located on the valve seat. The valve cover is connected to the outer shell. The valve cover and the valve seat serve to limit the movement of the valve ball. The valve ball moves in the inner cavity formed by the valve cover and the valve seat. In a normal state, the valve ball sits on the valve seat, and the fluid flows up and down in the valve cover.

[0023] The oil pump valve assembly is an oil pump floating valve assembly, including an outer shell, a valve cover, a valve ball, a valve seat, and a truncated sucker rod head. The outer shell is connected to the upper end of the valve cover, the truncated sucker rod head is connected to the valve cover to seal the liquid outlet hole on the upper part of the valve cover, the lower end of the valve cover is connected to the outer shell, the valve seat and the valve ball are located in the valve cover, the valve cover and the valve seat serve to limit the movement of the valve ball, and the valve ball moves in the inner cavity formed by the valve cover and the valve seat. The upper and lower interior of the valve cover are through-hole structures, and there is a through-hole in the lateral vertical axial direction. The outer wall of the valve cover and the shell cavity connected to the upper end constitute a channel for medium flow.

[0024] The oil well pump valve simulation test device of the present invention can output high-pressure liquid in both forward and reverse directions alternately through the hydraulic pump station, simulating the impact of the valve ball during the upstroke and downstroke of a deep well oil well pump. It can test the impact resistance and wear resistance of the valve ball, valve seat and valve cover, thereby verifying the working performance of the pump valve and solving the problems of existing simulation devices such as being unable to withstand high pressure and carrying sand. Compared with the existing technology, its beneficial effects are:

[0025] (1) The present invention utilizes a hydraulic pump station to alternately output high-pressure liquid in both forward and reverse directions to the pump and valve assembly of the oil well pump, simulating the impact conditions of the valve ball, valve seat and valve cover during the operation of the downhole oil well pump, thereby realizing the testing of the impact resistance and wear resistance of the valve ball, valve seat and valve cover, and providing a device for studying the performance of the valve ball, valve seat and valve cover in the laboratory.

[0026] (2) The present invention incorporates filters at the inlet and outlet of the oil well pump valve assembly to protect the cleanliness of the liquid returning to the hydraulic pump station. This design simulates the working conditions of the oil well pump valve in a sand-producing oil well. By adding sand particles to the oil well pump valve assembly, the impact and wear of the pump valve in a solid-liquid two-phase fluid carrying sand particles can be tested.

[0027] (3) The device of the present invention has a simple structure and can simulate the working conditions of high water content, high mineralization, sand-carrying fluid, etc. under high pressure difference for the key core components of the oil well pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of a specific embodiment of the oil well pump valve simulation test device of the present invention;

[0029] Figure 2 A schematic diagram of a fixed valve assembly of a wellbore pump used for testing in a specific embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a traveling valve assembly of a well pump used for testing in a specific embodiment of the present invention;

[0031] In the figure: 1-oil tank, 2-gear pump, 3-motor, 4-oil suction filter, 5-air filter, 6-liquid level and temperature gauge, 7-cartridge relief valve, 8-cartridge check valve, 9-cartridge solenoid valve, 10-bell coupling, 11-pressure measuring joint (MA1 is the outlet pressure measuring joint, MB1 is the inlet pressure measuring joint), 12-pressure measuring tool, 13-air cooler, 14-high-pressure filter, 15-solenoid reversing valve, 16-superimposed speed regulating valve, 18-filter, 19-oil pump valve assembly, 20-outlet, 21-inlet, 22-housing, 23-valve cover, 24-valve ball, 25-valve seat, 26-truncated sucker rod head, 27-oil outlet hole, 28-oil outlet groove. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations and / or combinations thereof.

[0034] The oil pump valve simulation test device of the present invention includes a hydraulic pump station, a filter, and an oil pump valve assembly. The present invention controls the hydraulic pump station to alternately output high-pressure liquid to the oil pump valve assembly in both positive and negative directions, thereby realizing the impact of the up and down strokes on the valve ball, thereby simulating the operation of the oil pump valve ball, valve seat and valve cover in the oil well, and achieving the purpose of testing the impact resistance and wear resistance of the valve ball, valve seat and valve cover.

[0035] The hydraulic pump station mainly consists of an oil tank, an electric motor, an air cooler and a pump pressure gauge device. The gear pump is driven by the electric motor to suck the liquid in the oil tank through the oil suction filter and pump it into the oil pump valve assembly at high pressure. The electromagnetic reversing valve controls the positive and reverse alternating output of high-pressure liquid, simulating the impact of the produced liquid on the valve ball, valve seat and valve cover during the up and down strokes in actual oil well production.

[0036] The filter is connected to the inlet and outlet of the oil well pump valve assembly through threads to filter sand particles in the oil well pump valve assembly, simulating the working condition of the oil well pump in a sand producing oil well.

[0037] The present invention provides a method for hydraulic impact testing of oil well pump valves, comprising the following steps: connecting the test apparatus sequentially, and connecting the valve housing, valve ball, and valve seat to be tested to a hydraulic station. A test pressure differential of (0-25) MPa is set, and the tested components are impacted for a cumulative 1 million times. The test is then repeated according to the vacuum seal test method specified in GB / T 18607-2017, using a vacuum test method. At a minimum vacuum of 64.32 kPa, after remote isolation, there is no leakage for at least 3 seconds. During the test, the valve ball should rotate freely on the valve seat. Products that meet the seal criteria are considered qualified; otherwise, they are considered unqualified.

[0038] The valve balls and valve seats are randomly selected after grinding with the same process and batch, and their sealing performance meets the requirements of GB / T 18607-2017 before the impact test;

[0039] The test device records the pressure, number of impacts, and valve cover stress in real time during the test, and records the average value of 1000 to 2000 impacts before the initial operation. If one of the impact record data is lower than 20% of the previous average value, the test is judged to be over and the total number of impacts is recorded.

[0040] The following are several specific embodiments of the present invention.

[0041] Example 1

[0042] like Figure 1 Figure 1 shows the structure of a pump valve simulation test device for the present invention. The pump valve simulation test device comprises a hydraulic pump station, a filter 18, and a pump valve assembly 19. The hydraulic pump station primarily comprises an oil tank 1, an electric motor 3, an air cooler 13, and a gear pump 2. The filter 18 is threadedly connected to the inlet 20 and outlet 21 of the pump valve assembly 19. The pump valve assembly 19 includes both a fixed valve assembly and a floating valve assembly. Depending on the type of pump valve being studied, the corresponding pump valve assembly is selected and connected to the pipeline for testing.

[0043] 4 The oil suction filter is connected to 2 gear pumps through pipelines. 2 gear pumps are connected to 10 bell couplings and connected to 3 electric motors. 2 gear pumps are connected to 8 cartridge check valves through pipelines. 8 cartridge check valves are connected to 9 cartridge solenoid valves through pipelines and connected to 7 cartridge overflow valves. 9 cartridge solenoid valves are connected to 15 solenoid reversing valves. 15 solenoid reversing valves are connected to 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 20 The inlet is connected to 19 the oil well pump valve assembly. 8 cartridge check valves are connected to 12 pressure measuring tools and connected to 14 high-pressure filters. 15 solenoid reversing valves are connected to 15 solenoid reversing valves. 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 21 The outlet is connected to 19 the oil well pump valve assembly.

[0044] When the oil well pump valve simulation test device is working, when simulating the fixed valve upstroke, the motor rotates, drives the bell coupling, further drives the gear pump, and sucks the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is pressurized by the gear pump to enter the plug-in one-way valve, and then passes through the high-pressure filter through the electromagnetic reversing valve, and then passes through the filter to enter the inlet of the oil well pump valve assembly, and then passes through the outlet, through the filter, and then through the electromagnetic reversing valve, and then through the air cooler into the oil tank.

[0045] When simulating the downstroke of the fixed valve, the motor rotates, driving the bell coupling, further driving the gear pump, and sucking the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is then pressurized by the gear pump and enters the cartridge solenoid valve, and then passes through the solenoid reversing valve, through the outlet, and into the oil pump valve assembly. When the pressure exceeds the preset pressure, the medium passes through the cartridge overflow valve and then through the air cooler into the oil tank.

[0046] The hydraulic pump station provides a pump pressure range of 0-10 MPa, a reversing frequency range of 1 to 100 times / minute, and the liquid medium is hydraulic oil or water, or sand-carrying fluid.

[0047] The pipeline, electromagnetic reversing valve, etc. are rated to withstand a pressure of 15 MPa.

[0048] The filter uses a high-pressure filter to filter solid particles in the oil pump valve assembly with a filtration accuracy of 5μm, ensuring the cleanliness of the liquid returning to the hydraulic pump station and reducing the impact of sand particles on the operation of the hydraulic pump station.

[0049] The oil well pump valve assembly is an oil well pump fixed valve assembly, and its structure is as follows: Figure 2 , consisting of a shell 22, a valve cover 23, a valve ball 24, and a valve seat 25, and the connection method is that the valve cover 23, the valve ball 24, and the valve seat 25 are installed in the shell 22.

[0050] The oil well pump valve assembly is an oil well pump traveling valve assembly, and its structure is as follows: Figure 3, which consists of a shell 22, a valve cover 23, a valve ball 24, a valve seat 25, a truncated sucker rod head 26, an oil outlet hole 27, and an oil outlet groove 28. The connection method is that the valve cover 23, the valve ball 24, the valve seat 25, and the truncated sucker rod head 26 are installed in the shell 22.

[0051] Example 2:

[0052] In the specific embodiment 2 of the present invention, as Figure 1 As shown, the oil pump valve simulation test device includes a hydraulic pump station, a filter 18, and an oil pump valve assembly 19. The hydraulic pump station is mainly composed of an oil tank 1, an electric motor 3, an air cooler 13 and a gear pump 2. The filter 18 is threadedly connected to the inlet 20 and the outlet 21 of the oil pump valve assembly 19. The oil pump valve assembly 19 has two types: a fixed valve assembly and a floating valve assembly. According to the type of pump valve under study, the corresponding pump valve assembly is selected and connected to the pipeline for testing.

[0053] 4 The oil suction filter is connected to 2 gear pumps through pipelines. 2 gear pumps are connected to 10 bell couplings and connected to 3 electric motors. 2 gear pumps are connected to 8 cartridge check valves through pipelines. 8 cartridge check valves are connected to 9 cartridge solenoid valves through pipelines and connected to 7 cartridge overflow valves. 9 cartridge solenoid valves are connected to 15 solenoid reversing valves. 15 solenoid reversing valves are connected to 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 20 The inlet is connected to 19 the oil well pump valve assembly. 8 cartridge check valves are connected to 12 pressure measuring tools and connected to 14 high-pressure filters. 15 solenoid reversing valves are connected to 15 solenoid reversing valves. 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 21 The outlet is connected to 19 the oil well pump valve assembly.

[0054] When the oil well pump valve simulation test device is working, when simulating the fixed valve upstroke, the motor rotates, drives the bell coupling, further drives the gear pump, and sucks the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is pressurized by the gear pump to enter the plug-in one-way valve, and then passes through the high-pressure filter through the electromagnetic reversing valve, and then passes through the filter to enter the inlet of the oil well pump valve assembly, and then passes through the outlet, through the filter, and then through the electromagnetic reversing valve, and then through the air cooler into the oil tank.

[0055] When simulating the downstroke of the fixed valve, the motor rotates, driving the bell coupling, further driving the gear pump, and sucking the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is then pressurized by the gear pump and enters the cartridge solenoid valve, and then passes through the solenoid reversing valve, through the outlet, and into the oil pump valve assembly. When the pressure exceeds the preset pressure, the medium passes through the cartridge overflow valve and then through the air cooler into the oil tank.

[0056] The hydraulic pump station provides a pump pressure range of 10-20 MPa, a reversing frequency range of 1 to 100 times per minute, and the liquid medium is hydraulic oil or water, or sand-carrying fluid.

[0057] The pipeline, electromagnetic reversing valve, etc. are rated to withstand a pressure of 25 MPa.

[0058] The filter uses a high-pressure filter to filter solid particles in the oil pump valve assembly with a filtration accuracy of 5μm, ensuring the cleanliness of the liquid returning to the hydraulic pump station and reducing the impact of sand particles on the operation of the hydraulic pump station.

[0059] The oil well pump valve assembly is an oil well pump fixed valve assembly, and its structure is as follows: Figure 2 , consisting of a shell 22, a valve cover 23, a valve ball 24, and a valve seat 25, and the connection method is that the valve cover 23, the valve ball 24, and the valve seat 25 are installed in the shell 22.

[0060] The oil well pump valve assembly is an oil well pump traveling valve assembly, and its structure is as follows: Figure 3 , which consists of a shell 22, a valve cover 23, a valve ball 24, a valve seat 25, a truncated sucker rod head 26, an oil outlet hole 27, and an oil outlet groove 28. The connection method is that the valve cover 23, the valve ball 24, the valve seat 25, and the truncated sucker rod head 26 are installed in the shell 22.

[0061] Example 3:

[0062] In the specific embodiment 3 of the present invention, Figure 1 As shown, the oil pump valve simulation test device includes a hydraulic pump station, a filter 18, and an oil pump valve assembly 19. The hydraulic pump station is mainly composed of an oil tank 1, an electric motor 3, an air cooler 13 and a gear pump 2. The filter 18 is threadedly connected to the inlet 20 and the outlet 21 of the oil pump valve assembly 19. The oil pump valve assembly 19 has two types: a fixed valve assembly and a floating valve assembly. According to the type of pump valve under study, the corresponding pump valve assembly is selected and connected to the pipeline for testing.

[0063] 4 The oil suction filter is connected to 2 gear pumps through pipelines. 2 gear pumps are connected to 10 bell couplings and connected to 3 electric motors. 2 gear pumps are connected to 8 cartridge check valves through pipelines. 8 cartridge check valves are connected to 9 cartridge solenoid valves through pipelines and connected to 7 cartridge overflow valves. 9 cartridge solenoid valves are connected to 15 solenoid reversing valves. 15 solenoid reversing valves are connected to 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 20 The inlet is connected to 19 the oil well pump valve assembly. 8 cartridge check valves are connected to 12 pressure measuring tools and connected to 14 high-pressure filters. 15 solenoid reversing valves are connected to 15 solenoid reversing valves. 16 superimposed speed regulating valves and connected to 11 pressure measuring joints and connected to 18 filters. 21 The outlet is connected to 19 the oil well pump valve assembly.

[0064] When the oil well pump valve simulation test device is working, when simulating the fixed valve upstroke, the motor rotates, drives the bell coupling, further drives the gear pump, and sucks the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is pressurized by the gear pump to enter the plug-in one-way valve, and then passes through the high-pressure filter through the electromagnetic reversing valve, and then passes through the filter to enter the inlet of the oil well pump valve assembly, and then passes through the outlet, through the filter, and then through the electromagnetic reversing valve, and then through the air cooler into the oil tank.

[0065] When simulating the downstroke of the fixed valve, the motor rotates, driving the bell coupling, further driving the gear pump, and sucking the simulation medium (preferably hydraulic oil) from the oil tank. The simulation medium passes through the oil suction filter through the pipeline, and is then pressurized by the gear pump and enters the cartridge solenoid valve, and then passes through the solenoid reversing valve, through the outlet, and into the oil pump valve assembly. When the pressure exceeds the preset pressure, the medium passes through the cartridge overflow valve and then through the air cooler into the oil tank.

[0066] The hydraulic pump station provides a pump pressure range of 20-30 MPa, a reversing frequency range of 1 to 100 times per minute, and the liquid medium is hydraulic oil or water, or sand-carrying fluid.

[0067] The pipeline, electromagnetic reversing valve, etc. are rated to withstand a pressure of 35 MPa.

[0068] The filter uses a high-pressure filter to filter solid particles in the oil pump valve assembly with a filtration accuracy of 5μm, ensuring the cleanliness of the liquid returning to the hydraulic pump station and reducing the impact of sand particles on the operation of the hydraulic pump station.

[0069] The oil well pump valve assembly is an oil well pump fixed valve assembly, and its structure is as follows: Figure 2 , consisting of a shell 22, a valve cover 23, a valve ball 24, and a valve seat 25, and the connection method is that the valve cover 23, the valve ball 24, and the valve seat 25 are installed in the shell 22.

[0070] The oil well pump valve assembly is an oil well pump traveling valve assembly, and its structure is as follows: Figure 3 , which consists of a shell 22, a valve cover 23, a valve ball 24, a valve seat 25, a truncated sucker rod head 26, an oil outlet hole 27, and an oil outlet groove 28. The connection method is that the valve cover 23, the valve ball 24, the valve seat 25, and the truncated sucker rod head 26 are installed in the shell 22.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features therein. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0072] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

Claims

1. The oil well pump valve simulation test device is characterized by: The oil well pump valve simulation test device includes a hydraulic pump station and an oil well pump valve assembly. The hydraulic pump station outputs high-pressure liquid to the oil well pump valve assembly in a forward and reverse bidirectional alternating manner, realizing the impact of up and down strokes on the valve ball in the oil well pump valve assembly, simulating the operation of the oil well pump valve ball, valve seat and valve cover in the oil well, thereby testing the impact resistance and wear resistance of the valve ball, valve seat and valve cover. The oil well pump valve simulation test device also includes a filter, which is connected to the inlet and outlet of the oil well pump valve assembly to filter sand particles in the oil well pump valve assembly to simulate the working condition of the oil well pump in a sand producing oil well; The hydraulic pump station includes an oil tank, an oil suction filter, an electric motor, an air cooler, a bell coupling, a high-pressure filter, a cartridge-type one-way valve, an electromagnetic reversing valve and a gear pump. The electric motor is connected to the bell coupling, the bell coupling is connected to the gear pump, the oil suction filter is connected between the gear pump and the oil tank, the gear pump is connected to the cartridge-type one-way valve, the high-pressure filter is connected between the cartridge-type one-way valve and the electromagnetic reversing valve, the electromagnetic reversing valve is connected to the filter, and the air cooler is connected to the electromagnetic reversing valve. When the simulation When the fixed valve is in an upstroke, the motor works, driving the bell coupling, further driving the gear pump, and sucking the simulated medium from the oil tank. The simulated medium passes through the oil suction filter, is pressurized by the gear pump and enters the plug-in one-way valve, is filtered through the high-pressure filter, passes through the electromagnetic reversing valve, and then passes through the filter to enter the inlet of the oil pump valve assembly, enters the oil pump valve assembly, then passes through the outlet of the oil pump valve assembly, passes through the filter, passes through the electromagnetic reversing valve, and then passes through the air cooler into the oil tank.

2. The oil well pump valve simulation test device according to claim 1, characterized in that: The hydraulic pump station also includes a cartridge solenoid valve and a cartridge relief valve. The cartridge one-way valve is connected to the cartridge solenoid valve and the cartridge relief valve. The cartridge solenoid valve is connected to the electromagnetic reversing valve. When simulating the downstroke of the fixed valve, the motor rotates, driving the bell coupling, further driving the gear pump, and sucking the simulation medium from the oil tank. The simulation medium passes through the oil suction filter and is pressurized by the gear pump to enter the cartridge solenoid valve, and then passes through the electromagnetic reversing valve, passes through the outlet of the oil pump valve assembly, and enters the oil pump valve assembly. When the pressure exceeds the predetermined pressure of the cartridge relief valve, the simulation medium flows out through the overflow port of the cartridge relief valve, and then passes through the air cooler into the oil tank.

3. The oil well pump valve simulation test device according to claim 2, characterized in that: The hydraulic pump station also includes a superimposed speed regulating valve, which is located between the electromagnetic reversing valve and the filter and regulates and ensures the pressure at the inlet and outlet ends of the oil pump valve assembly.

4. The oil well pump valve simulation test device according to claim 3, characterized in that: The hydraulic pump station also includes a pressure measuring tool, which is located between the plug-in one-way valve and the high-pressure filter and measures the pressure at the inlet end of the superimposed speed regulating valve.

5. The oil well pump valve simulation test device according to claim 3, characterized in that: The hydraulic pump station also includes a pressure measuring joint, which is located between the superimposed speed regulating valve and the filter and measures the pressure at the inlet and outlet ends of the oil pump valve assembly.

6. The oil well pump valve simulation test device according to claim 1, characterized in that: The hydraulic pump station further comprises an air filter, which is located in the air cooler. Air enters the medium in the coil cooling pipeline through the air filter.

7. The oil well pump valve simulation test device according to claim 1, characterized in that: The hydraulic pump station also includes a liquid level and temperature gauge to measure whether the medium inside the oil tank is sufficient and whether the temperature exceeds the temperature limit of the oil tank and pipeline.

8. The oil well pump valve simulation test device according to claim 1, characterized in that: The oil pump valve assembly is a fixed valve assembly of the oil pump, including an outer shell, a valve cover, a valve ball and a valve seat. The upper and lower ends of the valve cover are connected to the outer shell. The valve ball and the valve seat are both located in the valve cover. The valve ball is located on the valve seat. The valve cover is connected to the outer shell. The valve cover and the valve seat serve to limit the movement of the valve ball. The valve ball moves in the inner cavity formed by the valve cover and the valve seat. In a normal state, the valve ball sits on the valve seat, and the fluid flows up and down in the valve cover.

9. The oil well pump valve simulation test device according to claim 1, characterized in that: The oil pump valve assembly is an oil pump floating valve assembly, including an outer shell, a valve cover, a valve ball, a valve seat, and a truncated sucker rod head. The outer shell is connected to the upper end of the valve cover, the truncated sucker rod head is connected to the valve cover to seal the liquid outlet hole on the upper part of the valve cover, the lower end of the valve cover is connected to the outer shell, the valve seat and the valve ball are located in the valve cover, the valve cover and the valve seat serve to limit the movement of the valve ball, and the valve ball moves in the inner cavity formed by the valve cover and the valve seat. The upper and lower interior of the valve cover are through-hole structures, and there is a through-hole in the lateral vertical axial direction. The outer wall of the valve cover and the shell cavity connected to the upper end constitute a channel for medium flow.

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